Print Email Facebook Twitter Design and Fabrication of an Albedo Insensitive Analog Sun Sensor Title Design and Fabrication of an Albedo Insensitive Analog Sun Sensor Author Wu, H. Emadi, A. De Graaf, G. Leijtens, J. Wolffenbuttel, R.F. Faculty Electrical Engineering, Mathematics and Computer Science Department Microelectronics Date 2011-09-04 Abstract A sun sensor is usually included in a satellite for optically measuring the position relative to the sun. The accuracy of a conventional sun sensor is affected by reflected sunlight at the nearby earth atmosphere: the albedo radiation. The part of the spectrum at near IR (1.5 ?m) is not included in the albedo radiation, due to the high water absorption in the earth atmosphere. The feasibility of such a near infrared (IR) analog albedo insensitive sun sensor in terms of the design constraints and fabrication is presented. The proposed sensor system comprises a spectral selective coating layer, a black absorbing coating layer, an anti-reflection layer, an InGaAs quadrant detector and is built on a sapphire substrate. The black absorbing ensures that the position measurement is not affected by back-reflected light from the detector surface. A lift-off process is used for patterning of the coating layer. Subject sun sensoroptical microsystem To reference this document use: http://resolver.tudelft.nl/uuid:bb3219d3-3bbd-4a47-aab8-2bfe2aff0da5 DOI https://doi.org/10.1016/j.proeng.2011.12.131 Publisher Elsevier ISSN 1877-7058 Source Procedia Engineering, 25, 2011 Part of collection Institutional Repository Document type journal article Rights © 2011 Elsevier Files PDF Wu_2011.pdf 627.5 KB Close viewer /islandora/object/uuid:bb3219d3-3bbd-4a47-aab8-2bfe2aff0da5/datastream/OBJ/view